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Status Future consideration
Created by Guest
Created on Nov 4, 2020

Allow initialisation using OPL of arrays within tuple sets

In OPL it is not possible to initialise an array which is within a set of tuples either through values or programmatically. An enhancement should be made to OPL to allow this.

Consider:

{string} Factors = {"a","b","c"};

tuple T_2 { key int i; int a[Factors]; };

{T_2} Processed_Data={<1,[2,3,4]>};

execute {writeln(Processed_Data);}

This returns an error:

Extension syntax not yet supported in this context.

Additionally, there is no syntax available to allow the array to be filled programmatically in OPL. An enhancement should be made to the OPL language to allow this.

Note that as a workaround the array can be filled in a roundabout way using ILOG Script like this:

tuple T_1 {

key int i;

int a;

int b;

int c;

};

{T_1} Input_Data={<7,3,4,9>,<8,2,3,5>,<9,1,2,7>};

{string} Factors = {"a","b","c"};

tuple T_2 {

key int i;

int a[Factors];

};

{T_2} Processed_Data;

int Temp[Factors];

execute FILL_PROCESSED_DATA {

for(var x in Input_Data) Processed_Data.add(x.i,Temp);

for(var p in Processed_Data) {

p.a["a"] = Input_Data.get(p.i).a;

p.a["b"] = Input_Data.get(p.i).b;

p.a["c"] = Input_Data.get(p.i).c;

}

}

Needed by Date Feb 4, 2021